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qgscomposermap.cpp
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qgscomposermap.cpp
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/***************************************************************************
qgscomposermap.cpp
-------------------
begin : January 2005
copyright : (C) 2005 by Radim Blazek
email : blazek@itc.it
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgscomposermap.h"
#include "qgscomposition.h"
#include "qgscoordinatetransform.h"
#include "qgslogger.h"
#include "qgsmaprenderer.h"
#include "qgsmaplayerregistry.h"
#include "qgsmaptopixel.h"
#include "qgsproject.h"
#include "qgsrasterlayer.h"
#include "qgsrendercontext.h"
#include "qgsscalecalculator.h"
#include "qgsvectorlayer.h"
#include "qgspallabeling.h"
#include "qgslabel.h"
#include "qgslabelattributes.h"
#include "qgssymbollayerv2utils.h" //for pointOnLineWithDistance
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QPainter>
#include <QSettings>
#include <cmath>
QgsComposerMap::QgsComposerMap( QgsComposition *composition, int x, int y, int width, int height )
: QgsComposerItem( x, y, width, height, composition ), mKeepLayerSet( false ),
mOverviewFrameMapId( -1 ), mOverviewBlendMode( QPainter::CompositionMode_SourceOver ), mOverviewInverted( false ), mOverviewCentered( false ),
mGridEnabled( false ), mGridStyle( Solid ),
mGridIntervalX( 0.0 ), mGridIntervalY( 0.0 ), mGridOffsetX( 0.0 ), mGridOffsetY( 0.0 ), mGridAnnotationFontColor( QColor( 0, 0, 0 ) ),
mGridAnnotationPrecision( 3 ), mShowGridAnnotation( false ), mGridBlendMode( QPainter::CompositionMode_SourceOver ),
mLeftGridAnnotationPosition( OutsideMapFrame ), mRightGridAnnotationPosition( OutsideMapFrame ),
mTopGridAnnotationPosition( OutsideMapFrame ), mBottomGridAnnotationPosition( OutsideMapFrame ), mAnnotationFrameDistance( 1.0 ),
mLeftGridAnnotationDirection( Horizontal ), mRightGridAnnotationDirection( Horizontal ), mTopGridAnnotationDirection( Horizontal ),
mBottomGridAnnotationDirection( Horizontal ), mGridFrameStyle( NoGridFrame ), mGridFrameWidth( 2.0 ),
mCrossLength( 3 ), mMapCanvas( 0 ), mDrawCanvasItems( true )
{
mComposition = composition;
mOverviewFrameMapSymbol = 0;
mGridLineSymbol = 0;
createDefaultOverviewFrameSymbol();
createDefaultGridLineSymbol();
mId = 0;
assignFreeId();
mMapRenderer = mComposition->mapRenderer();
mPreviewMode = QgsComposerMap::Rectangle;
mCurrentRectangle = rect();
// Cache
mCacheUpdated = false;
mDrawing = false;
//Offset
mXOffset = 0.0;
mYOffset = 0.0;
//get default composer font from settings
QSettings settings;
QString defaultFontString = settings.value( "/Composer/defaultFont" ).toString();
if ( !defaultFontString.isEmpty() )
{
mGridAnnotationFont.setFamily( defaultFontString );
}
connectUpdateSlot();
//calculate mExtent based on width/height ratio and map canvas extent
if ( mMapRenderer )
{
mExtent = mMapRenderer->extent();
}
setSceneRect( QRectF( x, y, width, height ) );
setToolTip( tr( "Map %1" ).arg( mId ) );
initGridAnnotationFormatFromProject();
}
QgsComposerMap::QgsComposerMap( QgsComposition *composition )
: QgsComposerItem( 0, 0, 10, 10, composition ), mKeepLayerSet( false ), mOverviewFrameMapId( -1 ),
mOverviewBlendMode( QPainter::CompositionMode_SourceOver ), mOverviewInverted( false ), mOverviewCentered( false ),
mGridEnabled( false ), mGridStyle( Solid ),
mGridIntervalX( 0.0 ), mGridIntervalY( 0.0 ), mGridOffsetX( 0.0 ), mGridOffsetY( 0.0 ), mGridAnnotationFontColor( QColor( 0, 0, 0 ) ),
mGridAnnotationPrecision( 3 ), mShowGridAnnotation( false ), mGridBlendMode( QPainter::CompositionMode_SourceOver ),
mLeftGridAnnotationPosition( OutsideMapFrame ), mRightGridAnnotationPosition( OutsideMapFrame ),
mTopGridAnnotationPosition( OutsideMapFrame ), mBottomGridAnnotationPosition( OutsideMapFrame ), mAnnotationFrameDistance( 1.0 ),
mLeftGridAnnotationDirection( Horizontal ), mRightGridAnnotationDirection( Horizontal ), mTopGridAnnotationDirection( Horizontal ),
mBottomGridAnnotationDirection( Horizontal ), mGridFrameStyle( NoGridFrame ), mGridFrameWidth( 2.0 ), mCrossLength( 3 ),
mMapCanvas( 0 ), mDrawCanvasItems( true )
{
mOverviewFrameMapSymbol = 0;
mGridLineSymbol = 0;
createDefaultOverviewFrameSymbol();
//Offset
mXOffset = 0.0;
mYOffset = 0.0;
connectUpdateSlot();
mComposition = composition;
mMapRenderer = mComposition->mapRenderer();
mId = mComposition->composerMapItems().size();
mPreviewMode = QgsComposerMap::Rectangle;
mCurrentRectangle = rect();
setToolTip( tr( "Map %1" ).arg( mId ) );
initGridAnnotationFormatFromProject();
}
void QgsComposerMap::extentCenteredOnOverview( QgsRectangle& extent ) const
{
extent = mExtent;
if ( ! mOverviewCentered )
{
return;
}
if ( mOverviewFrameMapId != -1 )
{
const QgsComposerMap* overviewFrameMap = mComposition->getComposerMapById( mOverviewFrameMapId );
QgsRectangle otherExtent = overviewFrameMap->extent();
QgsPoint center = otherExtent.center();
QgsRectangle movedExtent( center.x() - mExtent.width() / 2,
center.y() - mExtent.height() / 2,
center.x() - mExtent.width() / 2 + mExtent.width(),
center.y() - mExtent.height() / 2 + mExtent.height() );
extent = movedExtent;
}
}
QgsComposerMap::~QgsComposerMap()
{
delete mOverviewFrameMapSymbol;
delete mGridLineSymbol;
}
/* This function is called by paint() and cache() to render the map. It does not override any functions
from QGraphicsItem. */
void QgsComposerMap::draw( QPainter *painter, const QgsRectangle& extent, const QSizeF& size, double dpi, double* forceWidthScale )
{
if ( !painter )
{
return;
}
if ( !mMapRenderer )
{
return;
}
QgsMapRenderer theMapRenderer;
theMapRenderer.setExtent( extent );
theMapRenderer.setOutputSize( size, dpi );
if ( mMapRenderer->labelingEngine() )
theMapRenderer.setLabelingEngine( mMapRenderer->labelingEngine()->clone() );
//use stored layer set or read current set from main canvas
if ( mKeepLayerSet )
{
theMapRenderer.setLayerSet( mLayerSet );
}
else
{
theMapRenderer.setLayerSet( mMapRenderer->layerSet() );
}
theMapRenderer.setDestinationCrs( mMapRenderer->destinationCrs() );
theMapRenderer.setProjectionsEnabled( mMapRenderer->hasCrsTransformEnabled() );
//set antialiasing if enabled in options
QSettings settings;
// Changed to enable anti aliased rendering by default as of QGIS 1.7
if ( settings.value( "/qgis/enable_anti_aliasing", true ).toBool() )
{
painter->setRenderHint( QPainter::Antialiasing );
}
QgsRenderContext* theRendererContext = theMapRenderer.rendererContext();
if ( theRendererContext )
{
theRendererContext->setDrawEditingInformation( false );
theRendererContext->setRenderingStopped( false );
}
// force vector output (no caching of marker images etc.)
theRendererContext->setForceVectorOutput( true );
// make the renderer respect the composition's useAdvancedEffects flag
theRendererContext->setUseAdvancedEffects( mComposition->useAdvancedEffects() );
//force composer map scale for scale dependent visibility
double bk_scale = theMapRenderer.scale();
theMapRenderer.setScale( scale() );
//layer caching (as QImages) cannot be done for composer prints
QSettings s;
bool bkLayerCaching = s.value( "/qgis/enable_render_caching", false ).toBool();
s.setValue( "/qgis/enable_render_caching", false );
if ( forceWidthScale ) //force wysiwyg line widths / marker sizes
{
theMapRenderer.render( painter, forceWidthScale );
}
else
{
theMapRenderer.render( painter );
}
s.setValue( "/qgis/enable_render_caching", bkLayerCaching );
theMapRenderer.setScale( bk_scale );
}
void QgsComposerMap::cache( void )
{
if ( mPreviewMode == Rectangle )
{
return;
}
if ( mDrawing )
{
return;
}
mDrawing = true;
//in case of rotation, we need to request a larger rectangle and create a larger cache image
QgsRectangle requestExtent;
requestedExtent( requestExtent );
double horizontalVScaleFactor = horizontalViewScaleFactor();
if ( horizontalVScaleFactor < 0 )
{
horizontalVScaleFactor = mLastValidViewScaleFactor;
}
int w = requestExtent.width() * mapUnitsToMM() * horizontalVScaleFactor;
int h = requestExtent.height() * mapUnitsToMM() * horizontalVScaleFactor;
if ( w > 5000 ) //limit size of image for better performance
{
w = 5000;
}
if ( h > 5000 )
{
h = 5000;
}
double forcedWidthScaleFactor = w / requestExtent.width() / mapUnitsToMM();
mCacheImage = QImage( w, h, QImage::Format_ARGB32 );
if ( hasBackground() )
{
//Initially fill image with specified background color. This ensures that layers with blend modes will
//preview correctly
mCacheImage.fill( backgroundColor().rgba() );
}
else
{
//no background, but start with empty fill to avoid artifacts
mCacheImage.fill( QColor( 255, 255, 255, 0 ).rgba() );
}
double mapUnitsPerPixel = mExtent.width() / w;
// WARNING: ymax in QgsMapToPixel is device height!!!
QgsMapToPixel transform( mapUnitsPerPixel, h, requestExtent.yMinimum(), requestExtent.xMinimum() );
QPainter p( &mCacheImage );
draw( &p, requestExtent, QSizeF( w, h ), mCacheImage.logicalDpiX(), &forcedWidthScaleFactor );
p.end();
mCacheUpdated = true;
mDrawing = false;
}
void QgsComposerMap::paint( QPainter* painter, const QStyleOptionGraphicsItem* itemStyle, QWidget* pWidget )
{
Q_UNUSED( pWidget );
if ( !mComposition || !painter )
{
return;
}
QRectF thisPaintRect = QRectF( 0, 0, QGraphicsRectItem::rect().width(), QGraphicsRectItem::rect().height() );
painter->save();
painter->setClipRect( thisPaintRect );
if ( mComposition->plotStyle() == QgsComposition::Preview && mPreviewMode == Rectangle )
{
// Fill with background color
drawBackground( painter );
QFont messageFont( "", 12 );
painter->setFont( messageFont );
painter->setPen( QColor( 0, 0, 0 ) );
painter->drawText( thisPaintRect, tr( "Map will be printed here" ) );
}
else if ( mComposition->plotStyle() == QgsComposition::Preview )
{
//draw cached pixmap. This function does not call cache() any more because
//Qt 4.4.0 and 4.4.1 have problems with recursive paintings
//QgsComposerMap::cache() and QgsComposerMap::update() need to be called by
//client functions
//Background color is already included in cached image, so no need to draw
QgsRectangle requestRectangle;
requestedExtent( requestRectangle );
QgsRectangle cExtent;
extentCenteredOnOverview( cExtent );
double horizontalVScaleFactor = horizontalViewScaleFactor();
if ( horizontalVScaleFactor < 0 )
{
horizontalVScaleFactor = mLastValidViewScaleFactor;
}
double imagePixelWidth = mExtent.width() / requestRectangle.width() * mCacheImage.width() ; //how many pixels of the image are for the map extent?
double scale = rect().width() / imagePixelWidth;
QgsPoint rotationPoint = QgsPoint(( cExtent.xMaximum() + cExtent.xMinimum() ) / 2.0, ( cExtent.yMaximum() + cExtent.yMinimum() ) / 2.0 );
//shift such that rotation point is at 0/0 point in the coordinate system
double yShiftMM = ( requestRectangle.yMaximum() - rotationPoint.y() ) * mapUnitsToMM();
double xShiftMM = ( requestRectangle.xMinimum() - rotationPoint.x() ) * mapUnitsToMM();
//shift such that top left point of the extent at point 0/0 in item coordinate system
double xTopLeftShift = ( rotationPoint.x() - cExtent.xMinimum() ) * mapUnitsToMM();
double yTopLeftShift = ( cExtent.yMaximum() - rotationPoint.y() ) * mapUnitsToMM();
painter->save();
painter->translate( mXOffset, mYOffset );
painter->translate( xTopLeftShift, yTopLeftShift );
painter->rotate( mRotation );
painter->translate( xShiftMM, -yShiftMM );
painter->scale( scale, scale );
painter->drawImage( 0, 0, mCacheImage );
//restore rotation
painter->restore();
//draw canvas items
drawCanvasItems( painter, itemStyle );
}
else if ( mComposition->plotStyle() == QgsComposition::Print ||
mComposition->plotStyle() == QgsComposition::Postscript )
{
if ( mDrawing )
{
return;
}
mDrawing = true;
QPaintDevice* thePaintDevice = painter->device();
if ( !thePaintDevice )
{
return;
}
// Fill with background color
drawBackground( painter );
QgsRectangle requestRectangle;
requestedExtent( requestRectangle );
QgsRectangle cExtent;
extentCenteredOnOverview( cExtent );
QSizeF theSize( requestRectangle.width() * mapUnitsToMM(), requestRectangle.height() * mapUnitsToMM() );
QgsPoint rotationPoint = QgsPoint(( cExtent.xMaximum() + cExtent.xMinimum() ) / 2.0, ( cExtent.yMaximum() + cExtent.yMinimum() ) / 2.0 );
//shift such that rotation point is at 0/0 point in the coordinate system
double yShiftMM = ( requestRectangle.yMaximum() - rotationPoint.y() ) * mapUnitsToMM();
double xShiftMM = ( requestRectangle.xMinimum() - rotationPoint.x() ) * mapUnitsToMM();
//shift such that top left point of the extent at point 0/0 in item coordinate system
double xTopLeftShift = ( rotationPoint.x() - cExtent.xMinimum() ) * mapUnitsToMM();
double yTopLeftShift = ( cExtent.yMaximum() - rotationPoint.y() ) * mapUnitsToMM();
painter->save();
painter->translate( mXOffset, mYOffset );
painter->translate( xTopLeftShift, yTopLeftShift );
painter->rotate( mRotation );
painter->translate( xShiftMM, -yShiftMM );
draw( painter, requestRectangle, theSize, 25.4 ); //scene coordinates seem to be in mm
//restore rotation
painter->restore();
//draw canvas items
drawCanvasItems( painter, itemStyle );
mDrawing = false;
}
painter->setClipRect( thisPaintRect , Qt::NoClip );
if ( mGridEnabled )
{
drawGrid( painter );
}
drawFrame( painter );
if ( isSelected() )
{
drawSelectionBoxes( painter );
}
if ( mOverviewFrameMapId != -1 )
{
drawOverviewMapExtent( painter );
}
painter->restore();
}
void QgsComposerMap::updateCachedImage( void )
{
syncLayerSet(); //layer list may have changed
mCacheUpdated = false;
cache();
QGraphicsRectItem::update();
}
void QgsComposerMap::renderModeUpdateCachedImage()
{
if ( mPreviewMode == Render )
{
updateCachedImage();
}
}
void QgsComposerMap::setCacheUpdated( bool u )
{
mCacheUpdated = u;
}
double QgsComposerMap::scale() const
{
QgsScaleCalculator calculator;
calculator.setMapUnits( mMapRenderer->mapUnits() );
calculator.setDpi( 25.4 ); //QGraphicsView units are mm
return calculator.calculate( mExtent, rect().width() );
}
void QgsComposerMap::resize( double dx, double dy )
{
//setRect
QRectF currentRect = rect();
QRectF newSceneRect = QRectF( transform().dx(), transform().dy(), currentRect.width() + dx, currentRect.height() + dy );
setSceneRect( newSceneRect );
updateItem();
}
void QgsComposerMap::moveContent( double dx, double dy )
{
if ( !mDrawing )
{
transformShift( dx, dy );
mExtent.setXMinimum( mExtent.xMinimum() + dx );
mExtent.setXMaximum( mExtent.xMaximum() + dx );
mExtent.setYMinimum( mExtent.yMinimum() + dy );
mExtent.setYMaximum( mExtent.yMaximum() + dy );
cache();
update();
emit itemChanged();
emit extentChanged();
}
}
void QgsComposerMap::zoomContent( int delta, double x, double y )
{
if ( mDrawing )
{
return;
}
QSettings settings;
//read zoom mode
//0: zoom, 1: zoom and recenter, 2: zoom to cursor, 3: nothing
int zoomMode = settings.value( "/qgis/wheel_action", 2 ).toInt();
if ( zoomMode == 3 ) //do nothing
{
return;
}
double zoomFactor = settings.value( "/qgis/zoom_factor", 2.0 ).toDouble();
//find out new center point
double centerX = ( mExtent.xMaximum() + mExtent.xMinimum() ) / 2;
double centerY = ( mExtent.yMaximum() + mExtent.yMinimum() ) / 2;
if ( zoomMode != 0 )
{
//find out map coordinates of mouse position
double mapMouseX = mExtent.xMinimum() + ( x / rect().width() ) * ( mExtent.xMaximum() - mExtent.xMinimum() );
double mapMouseY = mExtent.yMinimum() + ( 1 - ( y / rect().height() ) ) * ( mExtent.yMaximum() - mExtent.yMinimum() );
if ( zoomMode == 1 ) //zoom and recenter
{
centerX = mapMouseX;
centerY = mapMouseY;
}
else if ( zoomMode == 2 ) //zoom to cursor
{
centerX = mapMouseX + ( centerX - mapMouseX ) * ( 1.0 / zoomFactor );
centerY = mapMouseY + ( centerY - mapMouseY ) * ( 1.0 / zoomFactor );
}
}
double newIntervalX, newIntervalY;
if ( delta > 0 )
{
newIntervalX = ( mExtent.xMaximum() - mExtent.xMinimum() ) / zoomFactor;
newIntervalY = ( mExtent.yMaximum() - mExtent.yMinimum() ) / zoomFactor;
}
else if ( delta < 0 )
{
newIntervalX = ( mExtent.xMaximum() - mExtent.xMinimum() ) * zoomFactor;
newIntervalY = ( mExtent.yMaximum() - mExtent.yMinimum() ) * zoomFactor;
}
else //no need to zoom
{
return;
}
mExtent.setXMaximum( centerX + newIntervalX / 2 );
mExtent.setXMinimum( centerX - newIntervalX / 2 );
mExtent.setYMaximum( centerY + newIntervalY / 2 );
mExtent.setYMinimum( centerY - newIntervalY / 2 );
cache();
update();
emit itemChanged();
emit extentChanged();
}
void QgsComposerMap::setSceneRect( const QRectF& rectangle )
{
double w = rectangle.width();
double h = rectangle.height();
//prepareGeometryChange();
QgsComposerItem::setSceneRect( rectangle );
//QGraphicsRectItem::update();
double newHeight = mExtent.width() * h / w ;
mExtent = QgsRectangle( mExtent.xMinimum(), mExtent.yMinimum(), mExtent.xMaximum(), mExtent.yMinimum() + newHeight );
mCacheUpdated = false;
updateBoundingRect();
update();
emit itemChanged();
emit extentChanged();
}
void QgsComposerMap::setNewExtent( const QgsRectangle& extent )
{
if ( mExtent == extent )
{
return;
}
mExtent = extent;
//adjust height
QRectF currentRect = rect();
double newHeight = currentRect.width() * extent.height() / extent.width();
setSceneRect( QRectF( transform().dx(), transform().dy(), currentRect.width(), newHeight ) );
updateItem();
}
void QgsComposerMap::setNewScale( double scaleDenominator )
{
double currentScaleDenominator = scale();
if ( scaleDenominator == currentScaleDenominator )
{
return;
}
double scaleRatio = scaleDenominator / currentScaleDenominator;
mExtent.scale( scaleRatio );
mCacheUpdated = false;
cache();
update();
emit itemChanged();
emit extentChanged();
}
void QgsComposerMap::setPreviewMode( PreviewMode m )
{
mPreviewMode = m;
emit itemChanged();
}
void QgsComposerMap::setOffset( double xOffset, double yOffset )
{
mXOffset = xOffset;
mYOffset = yOffset;
}
void QgsComposerMap::setMapRotation( double r )
{
setRotation( r );
emit rotationChanged( r );
emit itemChanged();
}
void QgsComposerMap::updateItem()
{
if ( mPreviewMode != QgsComposerMap::Rectangle && !mCacheUpdated )
{
cache();
}
QgsComposerItem::updateItem();
}
bool QgsComposerMap::containsWMSLayer() const
{
if ( !mMapRenderer )
{
return false;
}
QStringList layers = mMapRenderer->layerSet();
QStringList::const_iterator layer_it = layers.constBegin();
QgsMapLayer* currentLayer = 0;
for ( ; layer_it != layers.constEnd(); ++layer_it )
{
currentLayer = QgsMapLayerRegistry::instance()->mapLayer( *layer_it );
if ( currentLayer )
{
QgsRasterLayer* currentRasterLayer = qobject_cast<QgsRasterLayer *>( currentLayer );
if ( currentRasterLayer )
{
const QgsRasterDataProvider* rasterProvider = 0;
if (( rasterProvider = currentRasterLayer->dataProvider() ) )
{
if ( rasterProvider->name() == "wms" )
{
return true;
}
}
}
}
}
return false;
}
bool QgsComposerMap::containsAdvancedEffects() const
{
// check if map contains advanced effects like blend modes, or flattened layers for transparency
if ( !mMapRenderer )
{
return false;
}
QStringList layers = mMapRenderer->layerSet();
//Also need to check PAL labeling for blend modes
QgsPalLabeling* lbl = dynamic_cast<QgsPalLabeling*>( mMapRenderer->labelingEngine() );
QStringList::const_iterator layer_it = layers.constBegin();
QgsMapLayer* currentLayer = 0;
for ( ; layer_it != layers.constEnd(); ++layer_it )
{
currentLayer = QgsMapLayerRegistry::instance()->mapLayer( *layer_it );
if ( currentLayer )
{
if ( currentLayer->blendMode() != QPainter::CompositionMode_SourceOver )
{
return true;
}
// if vector layer, check labels and feature blend mode
QgsVectorLayer* currentVectorLayer = qobject_cast<QgsVectorLayer *>( currentLayer );
if ( currentVectorLayer )
{
if ( currentVectorLayer->layerTransparency() != 0 )
{
return true;
}
if ( currentVectorLayer->featureBlendMode() != QPainter::CompositionMode_SourceOver )
{
return true;
}
// check label blend modes
if ( lbl->willUseLayer( currentVectorLayer ) )
{
// Check all label blending properties
QgsPalLayerSettings& layerSettings = lbl->layer( currentVectorLayer->id() );
if (( layerSettings.blendMode != QPainter::CompositionMode_SourceOver ) ||
( layerSettings.bufferSize != 0 && layerSettings.bufferBlendMode != QPainter::CompositionMode_SourceOver ) ||
( layerSettings.shadowDraw && layerSettings.shadowBlendMode != QPainter::CompositionMode_SourceOver ) ||
( layerSettings.shapeDraw && layerSettings.shapeBlendMode != QPainter::CompositionMode_SourceOver ) )
{
return true;
}
}
}
}
}
return false;
}
void QgsComposerMap::connectUpdateSlot()
{
//connect signal from layer registry to update in case of new or deleted layers
QgsMapLayerRegistry* layerRegistry = QgsMapLayerRegistry::instance();
if ( layerRegistry )
{
connect( layerRegistry, SIGNAL( layerWillBeRemoved( QString ) ), this, SLOT( updateCachedImage() ) );
connect( layerRegistry, SIGNAL( layerWasAdded( QgsMapLayer* ) ), this, SLOT( updateCachedImage() ) );
}
}
bool QgsComposerMap::writeXML( QDomElement& elem, QDomDocument & doc ) const
{
if ( elem.isNull() )
{
return false;
}
QDomElement composerMapElem = doc.createElement( "ComposerMap" );
composerMapElem.setAttribute( "id", mId );
//previewMode
if ( mPreviewMode == Cache )
{
composerMapElem.setAttribute( "previewMode", "Cache" );
}
else if ( mPreviewMode == Render )
{
composerMapElem.setAttribute( "previewMode", "Render" );
}
else //rectangle
{
composerMapElem.setAttribute( "previewMode", "Rectangle" );
}
if ( mKeepLayerSet )
{
composerMapElem.setAttribute( "keepLayerSet", "true" );
}
else
{
composerMapElem.setAttribute( "keepLayerSet", "false" );
}
if ( mDrawCanvasItems )
{
composerMapElem.setAttribute( "drawCanvasItems", "true" );
}
else
{
composerMapElem.setAttribute( "drawCanvasItems", "false" );
}
//overview map frame
QDomElement overviewFrameElem = doc.createElement( "overviewFrame" );
overviewFrameElem.setAttribute( "overviewFrameMap", mOverviewFrameMapId );
overviewFrameElem.setAttribute( "overviewBlendMode", QgsMapRenderer::getBlendModeEnum( mOverviewBlendMode ) );
if ( mOverviewInverted )
{
overviewFrameElem.setAttribute( "overviewInverted", "true" );
}
else
{
overviewFrameElem.setAttribute( "overviewInverted", "false" );
}
overviewFrameElem.setAttribute( "overviewCentered", mOverviewCentered ? "true" : "false" );
QDomElement overviewFrameStyleElem = QgsSymbolLayerV2Utils::saveSymbol( QString(), mOverviewFrameMapSymbol, doc );
overviewFrameElem.appendChild( overviewFrameStyleElem );
composerMapElem.appendChild( overviewFrameElem );
//extent
QDomElement extentElem = doc.createElement( "Extent" );
extentElem.setAttribute( "xmin", qgsDoubleToString( mExtent.xMinimum() ) );
extentElem.setAttribute( "xmax", qgsDoubleToString( mExtent.xMaximum() ) );
extentElem.setAttribute( "ymin", qgsDoubleToString( mExtent.yMinimum() ) );
extentElem.setAttribute( "ymax", qgsDoubleToString( mExtent.yMaximum() ) );
composerMapElem.appendChild( extentElem );
//layer set
QDomElement layerSetElem = doc.createElement( "LayerSet" );
QStringList::const_iterator layerIt = mLayerSet.constBegin();
for ( ; layerIt != mLayerSet.constEnd(); ++layerIt )
{
QDomElement layerElem = doc.createElement( "Layer" );
QDomText layerIdText = doc.createTextNode( *layerIt );
layerElem.appendChild( layerIdText );
layerSetElem.appendChild( layerElem );
}
composerMapElem.appendChild( layerSetElem );
//overview map frame
composerMapElem.setAttribute( "overviewFrameMap", mOverviewFrameMapId );
//grid
QDomElement gridElem = doc.createElement( "Grid" );
gridElem.setAttribute( "show", mGridEnabled );
gridElem.setAttribute( "gridStyle", mGridStyle );
gridElem.setAttribute( "intervalX", qgsDoubleToString( mGridIntervalX ) );
gridElem.setAttribute( "intervalY", qgsDoubleToString( mGridIntervalY ) );
gridElem.setAttribute( "offsetX", qgsDoubleToString( mGridOffsetX ) );
gridElem.setAttribute( "offsetY", qgsDoubleToString( mGridOffsetY ) );
gridElem.setAttribute( "crossLength", qgsDoubleToString( mCrossLength ) );
gridElem.setAttribute( "gridFrameStyle", mGridFrameStyle );
gridElem.setAttribute( "gridFrameWidth", qgsDoubleToString( mGridFrameWidth ) );
gridElem.setAttribute( "gridBlendMode", QgsMapRenderer::getBlendModeEnum( mGridBlendMode ) );
QDomElement gridLineStyleElem = QgsSymbolLayerV2Utils::saveSymbol( QString(), mGridLineSymbol, doc );
gridElem.appendChild( gridLineStyleElem );
//grid annotation
QDomElement annotationElem = doc.createElement( "Annotation" );
annotationElem.setAttribute( "format", mGridAnnotationFormat );
annotationElem.setAttribute( "show", mShowGridAnnotation );
annotationElem.setAttribute( "leftPosition", mLeftGridAnnotationPosition );
annotationElem.setAttribute( "rightPosition", mRightGridAnnotationPosition );
annotationElem.setAttribute( "topPosition", mTopGridAnnotationPosition );
annotationElem.setAttribute( "bottomPosition", mBottomGridAnnotationPosition );
annotationElem.setAttribute( "leftDirection", mLeftGridAnnotationDirection );
annotationElem.setAttribute( "rightDirection", mRightGridAnnotationDirection );
annotationElem.setAttribute( "topDirection", mTopGridAnnotationDirection );
annotationElem.setAttribute( "bottomDirection", mBottomGridAnnotationDirection );
annotationElem.setAttribute( "frameDistance", QString::number( mAnnotationFrameDistance ) );
annotationElem.setAttribute( "font", mGridAnnotationFont.toString() );
annotationElem.setAttribute( "precision", mGridAnnotationPrecision );
//annotation font color
QDomElement annotationFontColorElem = doc.createElement( "fontColor" );
annotationFontColorElem.setAttribute( "red", mGridAnnotationFontColor.red() );
annotationFontColorElem.setAttribute( "green", mGridAnnotationFontColor.green() );
annotationFontColorElem.setAttribute( "blue", mGridAnnotationFontColor.blue() );
annotationElem.appendChild( annotationFontColorElem );
gridElem.appendChild( annotationElem );
composerMapElem.appendChild( gridElem );
elem.appendChild( composerMapElem );
return _writeXML( composerMapElem, doc );
}
bool QgsComposerMap::readXML( const QDomElement& itemElem, const QDomDocument& doc )
{
if ( itemElem.isNull() )
{
return false;
}
QString idRead = itemElem.attribute( "id", "not found" );
if ( idRead != "not found" )
{
mId = idRead.toInt();
}
mPreviewMode = Rectangle;
//previewMode
QString previewMode = itemElem.attribute( "previewMode" );
if ( previewMode == "Cache" )
{
mPreviewMode = Cache;
}
else if ( previewMode == "Render" )
{
mPreviewMode = Render;
}
else
{
mPreviewMode = Rectangle;
}
QDomElement overviewFrameElem = itemElem.firstChildElement( "overviewFrame" );
if ( !overviewFrameElem.isNull() )
{
setOverviewFrameMap( overviewFrameElem.attribute( "overviewFrameMap", "-1" ).toInt() );
setOverviewBlendMode( QgsMapRenderer::getCompositionMode(( QgsMapRenderer::BlendMode ) overviewFrameElem.attribute( "overviewBlendMode", "0" ).toUInt() ) );
QString overviewInvertedFlag = overviewFrameElem.attribute( "overviewInverted" );
if ( overviewInvertedFlag.compare( "true", Qt::CaseInsensitive ) == 0 )
{
setOverviewInverted( true );
}
else
{
setOverviewInverted( false );
}
if ( overviewFrameElem.attribute( "overviewCentered" ).compare( "true", Qt::CaseInsensitive ) == 0 )
{
setOverviewCentered( true );
}
else
{
setOverviewCentered( false );
}
QDomElement overviewFrameSymbolElem = overviewFrameElem.firstChildElement( "symbol" );
if ( !overviewFrameSymbolElem.isNull() )
{
delete mOverviewFrameMapSymbol;
mOverviewFrameMapSymbol = dynamic_cast<QgsFillSymbolV2*>( QgsSymbolLayerV2Utils::loadSymbol( overviewFrameSymbolElem ) );
}
}
//extent
QDomNodeList extentNodeList = itemElem.elementsByTagName( "Extent" );
if ( extentNodeList.size() > 0 )
{
QDomElement extentElem = extentNodeList.at( 0 ).toElement();
double xmin, xmax, ymin, ymax;
xmin = extentElem.attribute( "xmin" ).toDouble();
xmax = extentElem.attribute( "xmax" ).toDouble();
ymin = extentElem.attribute( "ymin" ).toDouble();
ymax = extentElem.attribute( "ymax" ).toDouble();
mExtent = QgsRectangle( xmin, ymin, xmax, ymax );
}
//mKeepLayerSet flag
QString keepLayerSetFlag = itemElem.attribute( "keepLayerSet" );
if ( keepLayerSetFlag.compare( "true", Qt::CaseInsensitive ) == 0 )
{
mKeepLayerSet = true;
}
else
{
mKeepLayerSet = false;
}
QString drawCanvasItemsFlag = itemElem.attribute( "drawCanvasItems" );
if ( drawCanvasItemsFlag.compare( "true", Qt::CaseInsensitive ) == 0 )
{
mDrawCanvasItems = true;
}
else
{
mDrawCanvasItems = false;
}
//mLayerSet
QDomNodeList layerSetNodeList = itemElem.elementsByTagName( "LayerSet" );
QStringList layerSet;
if ( layerSetNodeList.size() > 0 )
{
QDomElement layerSetElem = layerSetNodeList.at( 0 ).toElement();
QDomNodeList layerIdNodeList = layerSetElem.elementsByTagName( "Layer" );
for ( int i = 0; i < layerIdNodeList.size(); ++i )
{
layerSet << layerIdNodeList.at( i ).toElement().text();
}
}
mLayerSet = layerSet;
mDrawing = false;
mNumCachedLayers = 0;
mCacheUpdated = false;
//grid
QDomNodeList gridNodeList = itemElem.elementsByTagName( "Grid" );
if ( gridNodeList.size() > 0 )
{
QDomElement gridElem = gridNodeList.at( 0 ).toElement();
mGridEnabled = ( gridElem.attribute( "show", "0" ) != "0" );
mGridStyle = QgsComposerMap::GridStyle( gridElem.attribute( "gridStyle", "0" ).toInt() );
mGridIntervalX = gridElem.attribute( "intervalX", "0" ).toDouble();
mGridIntervalY = gridElem.attribute( "intervalY", "0" ).toDouble();
mGridOffsetX = gridElem.attribute( "offsetX", "0" ).toDouble();
mGridOffsetY = gridElem.attribute( "offsetY", "0" ).toDouble();